Computer Science
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.304..419j&link_type=abstract
Nature (ISSN 0028-0836), vol. 304, Aug. 4, 1983, p. 419-421.
Computer Science
72
Binary Stars, Pulsars, Stellar Evolution, Stellar Models, Giant Stars, Neutron Stars, Stellar Envelopes, X Ray Sources
Scientific paper
A quantitative model is presented to account for the observed features of the binary pulsar PSR1953+53. A lower giant branch star is suggested to have evolved on a nuclear time scale while orbiting a neutron star, with mass transfer to the neutron star commencing when the giant attained its Roche lobe. A radius-core mass relationship was used to examined the processes that occurred after the hydrogen atmosphere was drained off to the neutron star. Tidal dissipation has circularized the orbit of the companion during mass transfer, while the orbit expanded. Accretion torques caused spin-up of the neutron star, which had a magnetic moment of no more than 3 x 10 to the 27th G/cu cm. The drained star became a degenerate dwarf with very faint luminosity, which accounts for no visual companion having been observed to date.
Joss Paul C.
Rappaport Saul A.
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